<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <!-- 删除子字符串的最大得分 -->
    <script>
      var maximumGain = function (s, x, y) {
        // x：较大分数值，x1x2：较大分数值的对应字符串
        let x1, x2
        x > y ? ((x1 = 'a'), (x2 = 'b')) : (([x, y] = [y, x]), (x1 = 'b'), (x2 = 'a'))
        // i,j维护x1和x2字符的剩余个数
        let i = 0
        let j = 0
        let ans = 0
        s += 'c'
        for (let c of s) {
          if (c == x1) i++
          else if (c == x2)
            if (i) {
              ans += x
              i--
            } else j++
          else {
            ans += Math.min(i, j) * y
            i = j = 0
          }
        }
        return ans
      }
      console.log(maximumGain('cdbcbbaaabab', 4, 5))
    </script>
  </body>
</html>
